package com.changgou.page.service.impl;

import com.alibaba.fastjson.JSON;
import com.changgou.goods.feign.CategoryFeign;
import com.changgou.goods.feign.SkuFeign;
import com.changgou.goods.feign.SpuFeign;
import com.changgou.goods.pojo.Category;
import com.changgou.goods.pojo.Sku;
import com.changgou.goods.pojo.Spu;
import com.changgou.page.service.PageService;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

@Service
public class PageServiceImpl implements PageService {


    @Value("${pagepath}")
    private String pagepath;

    @Autowired
    private TemplateEngine templateEngine;

    @Override
    public void generateHtml(String spuId)  {

        //1.拿数据
        Context context = new Context();
        Map<String, Object> itemData = this.getItemData(spuId);
        context.setVariables(itemData);
        //2.获取详情页面存储位置
        File dir = new File(pagepath);
        //3.文件存在
        if(!dir.exists()){
            dir.mkdirs();
        }
        //4.定义输出流，完成文件生成
        File file = new File(dir + "/" + spuId + ".html");
        Writer out= null;
        try{
            out = new PrintWriter(file);
            //生成静态化页面
            // 模板名称 context 输出流
            templateEngine.process("item",context,out);
        }catch(Exception e){
            e.printStackTrace();
        }finally {
            try {
                //5.关闭流
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

    }

    @Autowired
    private SkuFeign skuFeign;

    @Autowired
    private SpuFeign spuFeign;

    @Autowired
    private CategoryFeign categoryFeign;

    private Map<String, Object> getItemData(String spuId) {
        Map<String,Object> resultMap = new HashMap<>();
        //spu数据
        Spu spu = spuFeign.findSpuById(spuId).getData();
        resultMap.put("spu",spu);
        //图片信息
        if(spu != null){
            if(StringUtils.isNotEmpty(spu.getImages())){
                resultMap.put("imageList",spu.getImages().split(","));
            }
        }
        //sku数据
        List<Sku> skuList = skuFeign.findListBySpuId(spuId);
        resultMap.put("skuList",skuList);

        //商品分类信息
        Category category1 =  categoryFeign.findById(spu.getCategory1Id()).getData();
        resultMap.put("category1",category1);
        Category category2 =  categoryFeign.findById(spu.getCategory2Id()).getData();
        resultMap.put("category2",category2);
        Category category3 =  categoryFeign.findById(spu.getCategory3Id()).getData();
        resultMap.put("category3",category3);

        //规格信息
        resultMap.put("specificationList", JSON.parseObject(spu.getSpecItems(),Map.class));

        return resultMap;
    }
}
